Tungsten Carbide Cutting Tools Adhesive Wear

Bonding refers tungsten carbide cutting tools and workpiece material when exposed to the interatomic distance generated combined phenomenon. TC4 titanium alloy in high-speed cutting, the cutting temperature is high, the contact pressure, and the presence of microscopic surface roughness knife, resulting in reduced tungsten carbide hardness and adhesion between the workpiece and the tungsten carbide cutting tools and the workpiece material elemental affinity. When the bond strength high enough parts, parts outside of the local bond being cut. Shear occurs when the inner tool, part of the tools will be taken away chips, small-scale occurrence called adhesive wear, a large scale called chipping.

Small elastic modulus tungsten carbide cutting tools materials, the surface prone to rebound, so the process of cutting a large radial force, the actual contact area between the tools and the workpiece increases, the chip after the tools moves along the flank, the destruction of the hard after the alloy tools flank surface oxide layer, leading to flank wear after bonding tool. With the cutting progresses, eventually leading off the adhesive flank wear. At present, the international community generally after flank wear as a measure of the main criteria for tungsten carbide cutting tools life, severe flank wear will reduce the machined surface quality and dimensional accuracy. So after controlling for flank wear is an important way to improve the durability of tungsten carbide cutting tools.


 

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